. >> tax fraud appears to be a popular past time in u.n. prisons. a new report by treasurer's department says the irs detected more than 173,000 fraudulent tax returns from inmates last year. that's more than twice the number detected in 2010. some inmates steel identity from obituaries some even use their own but fudge the numbers to try to get much bigger tax refunds they deserve. in 2012 two inmates alone tried to claim more than $1 billion. the good news is the irs says it stopped those two and others from illegally claiming 2.5 billi 2.5 billion in last refunds last year. they are stepping up enforcement but says more needs to be done. $35 million slipped through the cracks and so the irs says it's very successful at detecting and stopping in incorrect refunds when prisoner data is available it adds there are significant challenges getting complete and consistent data from the multiple jurisdictions involved. still the agency says if committed to enhancing the process is to further minimize prisoner refund fraud. >> it is now 44 after the top o